local x = new Mapping {
  ["one"] = 1
  ["two"] = 2
}

res1 = x != x
res2 = x != new Mapping {
  ["one"] = 1
  ["two"] = 2
}
res3 = x != new Mapping {
  ["two"] = 2
}
res4 = x != new Mapping {
  ["one"] = 1
  ["two"] = 3
}
res5 = x != (x) {}
res6 = x != (x) { ["one"] = 1 }
res7 = x != (x) { ["one"] = 2 }
res8 = x != (x) { default = 9 }
res9 = (x) { default = 9 } != (x) { default = 10 }
res10 = new Mapping { ["one"] = 1 } != new Mapping { ["one"] = 1; default = 1 }
